The surface area s (in square meters) of a hot air balloon is given by...

[Bre-An]

The surface area s (in square meters) of a hot air balloon is given by S (r)=4 (pi)r^2 where r is the radius of the balloon (in meters). If the radius r is increasing with time t (in seconds) according to the formula r(t)=3/5t^4, t(greater than or equal to) 0, find the surface area S of the balloon as a function or the time t.

 

[stapel]

The surface area s (in square meters) of a hot air balloon is given by S (r)=4 (pi)r^2 where r is the radius of the balloon (in meters). If the radius r is increasing with time t (in seconds) according to the formula r(t)=3/5t^4, t(greater than or equal to) 0, find the surface area S of the balloon as a function or the time t.

So you're studying function composition; for this exercise, you plugged the one function into the other, simplified, and... then what? Please be complete. Thank you!